FP2 Serial Data Unit
Communication with External Devices
4 − 16
4.4 Sample Program
Procedure of communication
Data register
Ladder program
R10
, K0 , DT0 , K7 , K1
F151 WRT
R10
M ABC123DEF456 , DT0
F95 ASC ,
,HD
, DT7
F0 MV
Shared memory
FP2 serial data unit
FP series PLC
FP2 CPU unit
SendingReception
Received buffer cleared (Y11: off)
Reception completed (X1: off)
Shared memory cleared
Received buffer cleared (Y11: on)
Reception completed (X1: on)
Data area read command
and end code set in data register
Data written with F151
Sending directive (Y10: on)
Data area read command
“%01#RDD00000 00001 ** C
R
” sent
Sending completed (X0: on)
Value of PLC data register
on other side received
If normal: “%01$RD6400C800 F1 C
R
”
If erroneous: “%01! OO ϕϕ** C
R
”
Error code
Data read with F150
BCC
Communication setting
For COM.1 port
Setting contents
Valid (odd)
Invalid
Transmission speed
Data length (Character bit
)
Parity check
Stop bit length
Control signals CS and CD
Start code
Item
End code
19200bps
8 bits
1 bit
Invalid
C
R
(H0D)
Dip switch setting
FP2 serial data unit side
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